fdisk /dev/sdc
n
p
t
(8e) lvm 格式
w
[root@k8s-node1 ~]# vgdisplay
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 5
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 48.85 GiB
PE Size 4.00 MiB
Total PE 12506
Alloc PE / Size 12506 / 48.85 GiB
Free PE / Size 0 / 0
VG UUID RTG0sR-ldT5-pIBs-uTAe-XOTe-rGTR-inBDkd
[root@k8s-node1 ~]# pvcreate /dev/sdc1
Physical volume "/dev/sdc1" successfully created.
[root@k8s-node1 ~]# vgextend /dev/centos /dev/sdc1
Volume group "centos" successfully extended
[root@k8s-node1 ~]# vgdisplay
--- Volume group ---
VG Name centos
System ID
Format lvm2
Metadata Areas 3
Metadata Sequence No 6
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 3
Act PV 3
VG Size <68.85 GiB
PE Size 4.00 MiB
Total PE 17625
Alloc PE / Size 12506 / 48.85 GiB
Free PE / Size 5119 / <20.00 GiB
VG UUID RTG0sR-ldT5-pIBs-uTAe-XOTe-rGTR-inBDkd
[root@k8s-node1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 2.4G 0 2.4G 0% /dev
tmpfs 2.4G 0 2.4G 0% /dev/shm
tmpfs 2.4G 14M 2.4G 1% /run
tmpfs 2.4G 0 2.4G 0% /sys/fs/cgroup
/dev/mapper/centos-root 43G 10G 33G 24% /
/dev/sda1 197M 150M 48M 77% /boot
/dev/mapper/centos-var 6.0G 5.6G 385M 94% /var
[root@k8s-node1 ~]# lvextend -L +20460M /dev/mapper/centos-var
Size of logical volume centos/var changed from 5.92 GiB (1516 extents) to 25.90 GiB (6631 extents).
Logical volume centos/var successfully resized.
由于CentOS6和CentOS7在默认根文件系统的文件系统格式存在差异，需要判断是否为xfs，如果是xfs则应该使用xfs_growfs而
不是一味的使用resize2fs。
[root@k8s-node1 ~]# xfs_growfs /dev/mapper/centos-var
meta-data=/dev/mapper/centos-var isize=512 agcount=4, agsize=388096 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=1552384, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 1552384 to 6790144
[root@k8s-node1 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 2.4G 0 2.4G 0% /dev
tmpfs 2.4G 0 2.4G 0% /dev/shm
tmpfs 2.4G 14M 2.4G 1% /run
tmpfs 2.4G 0 2.4G 0% /sys/fs/cgroup
/dev/mapper/centos-root 43G 10G 33G 24% /
/dev/sda1 197M 150M 48M 77% /boot
/dev/mapper/centos-var 26G 5.2G 21G 20% /var